This directory contains a cumulative index table (CUM_INDX.TAB) which describes the location of all files on the PV04 collection (PVO-ORSE). In addition, there is a file (INDEX.TAB) which gives the name and location of all files on this volume. These index files have been provided for users who do not wish to make use of the DITDOS software. key files: CUM_INDX.TAB - contains a cumulative index for the PV04 volume set. CUM_INDX.LBL - describes the columns and format of CUM_INDX.TAB INDEX.TAB - contains an index of this volume (PV04_0015) INDEX.LBL - describes the columns and format of INDEX.TAB